Electronic Control Module (ECM) Connector End View - C1

Fig 1: Electronic Control Module (ECM) - C1 Connector End View

Courtesy of GENERAL MOTORS CORP.

Electronic Control Module (ECM) - C1 Connector Parts Information

Connector Part Information

OEM: 12582677
Service: 88988931
Description: 73-Way F Receptacle 0.64 2.8 Sealed (BK)

Terminal Part Information

Pins: 1, 9, 10, 11, 12, 13, 16, 17, 18, 19, 20, 23, 24, 27, 28, 29, 30, 31, 32, 33, 34, 36, 37, 38, 41, 47, 50, 52, 56, 58, 59, 61, 63, 65, 68
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 73
Terminal/Tray: 7116-4151-02/9
Core/Insulation Crimp: E/1
Release Tool/Test Probe: 12094430/J-35616-4A (PU)

Electronic Control Module (ECM) - C1 Connector Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	OG/BK	1786	Park/Neutral Signal Ignition Lock Cylinder Control Actuator Signal (2003 and later)
2-8	-	-	Not Used
9	WH	17	Stop Lamp Switch Signal or Stop Lamp Supply Voltage
10	PU/WH	1668	HO2S High Signal [- Bank 1 Sensor X]
11	TN/WH	1669	HO2S Low Signal [- Bank 1 Sensor X]
12	OG/BK	380	A/C Refrigerant Pressure Sensor Signal
13	TN	5514	GMX320 Low Reference
14-15	-	-	Not Used
16	PU	1589	Fuel Level Sensor Signal [- Primary]
17	D-BU	473	High Speed Cooling Fan Relay Control
18	BN	4	Accessory Voltage
19	PK	439	Ignition 1 Voltage
20	RD/WH	1540	Battery Positive Voltage
21-22	-	-	Not Used
23	PU	1272	Low Reference
24	D-GN	890	Fuel Tank Pressure Sensor Signal
25-26	-	-	Not Used
27	TN	2501	High Speed GMLAN Serial Data Bus-
28	TN/BK	2500	High Speed GMLAN Serial Data Bus+
29	D-BU	1161	APP Sensor 1 Signal
30	BN	1271	Low Reference
31	TN	2759	Low Reference
32	L-BU	1162	APP Sensor 2 Signal
33	GY	2709	5-Volt Reference
34	GY	2700	5-Volt Reference
35	-	-	Not Used
36	TN	1274	5-Volt Reference
37	TN	472	IAT Sensor Signal
38	TN	2760	Low Reference
39-40	-	-	Not Used
41	YE	492	MAF Sensor Signal
42-46	-	-	Not Used
47	PK/BK	5290	Ignition 1 Voltage
48-49	-	-	Not Used
50	D-GN/WH	465	Fuel Pump Relay Control [- Primary]
51	-	-	Not Used
52	YE	447	Starter Relay Coil Control
53-55	-	-	Not Used
56	WH/BK	1164	5-Volt Reference
57	-	-	Not Used
58	D-GN	335	Low Speed Cooling Fan Relay Control
59	BN	5069	MX320 Main Relay Control
60	-	-	Not Used
61	WH	1310	EVAP Canister Vent Solenoid Control
62	-	-	Not Used
63	D-GN/WH	459	A/C Compressor Clutch Relay Control
64	-	-	Not Used
65	GY/WH	3122	HO2S Heater Low Control [- Bank 2 Sensor 1]
66-67	-	-	Not Used
68	BN/WH	419	MIL Control
69-72	-	-	Not Used
73	BK/WH	451	Ground